which quantum computing ETF should I buy?

If you specifically want quantum-computing exposure, my pick would be QTUM (Defiance Quantum ETF) rather than one of the newer, highly concentrated quantum ETFs.

My ranking

1. QTUM — best overall for most investors

• Expense ratio: 0.40%
• About 89 holdings
• ~$5.5B in assets, so it has substantially more scale than the newer quantum ETFs.
• It isn't a pure-play quantum bet: the index also includes machine-learning and semiconductor/cloud companies. Current holdings include companies such as Microsoft, Palantir, Nutanix, Snowflake, and Arqit.
• That diversification is a feature in my view: quantum computing is still a highly speculative industry, so you aren't betting everything on a handful of companies successfully commercializing quantum hardware.

2. QNTM — more concentrated quantum exposure, but mainly relevant to non-U.S. investors

• VanEck's Quantum Computing UCITS ETF has 30 holdings and a 0.55% expense ratio.
• It's a European UCITS fund, so if you're a U.S. investor, QTUM is generally the more straightforward choice.

3. QPUX — only if you deliberately want an aggressive speculation

• Expense ratio: 1.29%
• Only 11 holdings
• Its exposure is extremely concentrated in IonQ, Quantum Computing Inc., D-Wave and Rigetti, using swaps.
• That's much closer to buying a leveraged-ish thematic basket of speculative quantum stocks than owning a diversified ETF. I wouldn't make this my core quantum position.

What I'd actually do

If you told me, "I have $10,000 and want to invest in the quantum-computing theme for 5–10 years," I'd be much more comfortable with something like:

$8,000 broad-market ETF + $1,500 QTUM + $500 individual quantum stock(s)

rather than putting $10,000 into a quantum ETF.

The reason is that quantum computing has enormous potential, but commercial success and timing are still uncertain. Even VanEck explicitly notes that commercial success remains uncertain and that quantum ETFs can include companies beyond pure-play quantum businesses.

If you want, I can also compare QTUM vs QPUX vs buying IonQ/D-Wave/Rigetti individually, including 5-year upside/downside scenarios and which I'd choose at today's prices.

When looking to invest in quantum computing through an Exchange-Traded Fund (ETF), your choice essentially comes down to pure-play focus vs. broader tech exposure . Because true pure-play quantum companies are rare and highly speculative, ETFs handle this sector quite differently.

The two primary dedicated choices available in the U.S. market break down as follows:

- **Expense Ratio:** 0.45%
- **The Vibe:** Pure-play/High-Purity.
- **How it works:** This fund targets companies explicitly driving innovation across the quantum ecosystem, scoring firms based on their quantum "revenue purity" (co-developed with quantum software firm Classiq). Its top holdings heavily feature dedicated quantum players like IonQ, D-Wave, and Rigetti.
- **Pros:** If you want your money actually tied to the direct performance of specialized quantum computing startups and hardware/software developers, this is the most direct vehicle.
- **Cons:** Higher volatility and beta. If the speculative quantum sector dips, WQTM will feel it heavily.[](https://google.com/goto?url=CAESWQHrOzAVnSJopqFr5QRhQ2Mec_3wo29ZBj0t50KdjKFr2ZbRlo4KKcQJEGaIf1XYQlZ5aRYgx2CyUMTMnkToGb-ICTGZ4Q3WOLvIrBWuFnmVLVBaRRaaGD48) [[1]](https://google.com/goto?url=CAESWQHrOzAVnSJopqFr5QRhQ2Mec_3wo29ZBj0t50KdjKFr2ZbRlo4KKcQJEGaIf1XYQlZ5aRYgx2CyUMTMnkToGb-ICTGZ4Q3WOLvIrBWuFnmVLVBaRRaaGD48)[[2]](https://google.com/goto?url=CAESfAHrOzAVDejh4dD1_gX6wnQ2hjvuy6ZFiDr4uXhy0i4hHdZYtd-7l8pRiLL5Tg7jA7BGbsYKC4WaLI_zN0_i2-8ES9n86bGF38Ca4-j_PRcEv2LvY3JZWhglJ2e6VqnxPPvd2Ci_pHlv9dAnrIBwtMi53mh-m2UL0k7ZMLI)[[3]](https://google.com/goto?url=CAESdQHrOzAVUGbpr7c0XIVOqCD1IacqxhglbyL_TY-UxWZbOwMsQJxQji325oZ0zyziZDbJY9rmO0T362U1qi3git7n4JDBGr4nyfU3IJAF29E-o90GNEF3xGoO9RcG-LEiah4-rH778RypCjQBk78LLRe-rTk_RQ)[[4]](https://google.com/goto?url=CAESXQHrOzAVTTFYUJ3QiSHd7zNNvcKYZXgnulhjsaMGUjYaZXQGe6xjHT5Ta_15hkfWW1Qe-ohOfhSWzyTgD7FAoX-Igwf3aEuFjGZ5s1YvD9S_QJQqMP_cwt2gb5z-nQ)[[5]](https://google.com/goto?url=CAESmwEB6zswFe6nhd1WapmOiFKaLWsIU4kt576liyyepv8t5huyHEUli1l2x4SDTW2pw_Fk4B740rGVRn5t7sgNiOfp_drO72TTYandOYYh8KERRZSKe-S-7LYkWBy97FlG-UWVx3ne5ZC7PE4gD92DrDOxymMvXlVWL5KD_8al6g1Kx_ir4ThfM0_La-IIrKfpkwOb60qhbi25YEj3Kg)

- **Expense Ratio:** 0.40%
- **The Vibe:** Broad tech/Indirect exposure.
- **How it works:** QTUM is a larger, more established fund (~$5.6B in assets), but it casts a very wide net. It includes machine learning, AI chips, big data, and large-cap tech stalwarts alongside actual quantum/superconducting material companies.
- **Pros:** Lower single-sector risk. Because it holds mega-cap tech and broader AI/cloud infrastructure names, its performance is heavily cushioned by broader tech trends.
- **Cons:** It isn't a true quantum ETF. A massive percentage of its movement is dictated by general tech market conditions rather than actual breakthroughs in quantum computing.[](https://google.com/goto?url=CAESRQHrOzAV1gVNn0yESGMQ_Qbsfuz0xMAQRpE7ODuPE-N6efTx24KX6pnoWWeHuS6Yvb0eZD4z5Clc4mCo18Z2-OrXKwNbrg) [[1]](https://google.com/goto?url=CAESRQHrOzAV1gVNn0yESGMQ_Qbsfuz0xMAQRpE7ODuPE-N6efTx24KX6pnoWWeHuS6Yvb0eZD4z5Clc4mCo18Z2-OrXKwNbrg)[[2]](https://google.com/goto?url=CAESdQHrOzAVUGbpr7c0XIVOqCD1IacqxhglbyL_TY-UxWZbOwMsQJxQji325oZ0zyziZDbJY9rmO0T362U1qi3git7n4JDBGr4nyfU3IJAF29E-o90GNEF3xGoO9RcG-LEiah4-rH778RypCjQBk78LLRe-rTk_RQ)[[3]](https://google.com/goto?url=CAESfAHrOzAVDejh4dD1_gX6wnQ2hjvuy6ZFiDr4uXhy0i4hHdZYtd-7l8pRiLL5Tg7jA7BGbsYKC4WaLI_zN0_i2-8ES9n86bGF38Ca4-j_PRcEv2LvY3JZWhglJ2e6VqnxPPvd2Ci_pHlv9dAnrIBwtMi53mh-m2UL0k7ZMLI)[[4]](https://google.com/goto?url=CAESkQEB6zswFZspBdCTFdtZ-cRQQQH8E-2BMkbYz1CUx_Ef1cMSLv-7rMI39wP6loVSZL4IQlMcvoKZYsbmdnZMgPTPKPEcHwakbo_m6m96qn37I0TmvUhc110R66CtVlxRx-Hwqg-BZK6oUJCjItX78Bjh1ZsKtrU80_5iB-AcYsH-JI0Mnjtpj0bimoZTkHKlg8kP)[[5]](https://google.com/goto?url=CAESgwEB6zswFcrgupDRlzgdsaY2ksbqf40r_zrADDH_V5R7sa4s1G6wnn8zWY1WbFcfUHGLpj_p0INwS54XY7nwnB10dJC4P1Cnv_jJ-Ok1Sqw75Xj3K3xaO1Go_F0OZb3GK399jXXVlTxaehoU9-ugvqlM2wFvIl3FgWoWvmKZ27G0IAaa8Q)

Which one should you pick?

• Choose WQTM if you want high conviction and direct exposure to the actual niche rise of dedicated quantum computing companies, accepting that it will behave like a high-risk, high-reward growth asset.
• Choose QTUM if you want diversified tech exposure that touches on quantum and machine learning themes without betting the farm on speculative micro/mid-cap quantum pure-plays.

To help narrow this down, what is your risk tolerance and time horizon for this investment? Are you looking for a aggressive speculative play or a broad tech-adjacent holding?

If you want quantum computing exposure through an ETF, the main choice for most investors is likely:

1. Defiance Quantum ETF (QTUM) — my top pick for broad exposure

Why it stands out:

• It is one of the oldest and largest dedicated quantum-themed ETFs.
• It does not just bet on pure-play quantum startups; it owns a basket of companies involved in quantum computing, machine learning, semiconductors, networking, and related infrastructure.
• It has about 80–90 holdings, which reduces the risk of betting on one company winning the quantum race.
• Expense ratio: about 0.40%.

Trade-off: QTUM is not a pure quantum ETF. Some holdings are broader technology companies that may benefit from AI, chips, or computing infrastructure rather than quantum specifically.

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Other options to consider

2. Pure-play quantum stocks (higher risk, not ETFs)

If you want a more aggressive quantum bet, investors often look at companies such as:

• IonQ
• Rigetti Computing
• D-Wave Quantum

These can move dramatically because the technology is still early-stage. QTUM actually includes some of these names but keeps their weights relatively small.

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How I’d think about allocating

A reasonable approach for a long-term investor might be:

• Conservative: 1–3% of portfolio in QTUM
• Aggressive thematic bet: 3–5% in QTUM
• Very bullish on quantum: QTUM plus a small basket of individual quantum stocks

I would generally avoid making quantum a large portfolio position today because:

• commercial quantum applications may take years to mature,
• many companies in the space may not become winners,
• valuations can get ahead of actual revenue.

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Bottom line

If you want one quantum ETF, I would lean toward QTUM because it gives you a diversified way to participate without needing to predict which quantum company wins.

If you tell me your investment horizon (5/10/20 years), risk tolerance, and whether this is in a taxable account or IRA, I can suggest a more tailored position size and whether QTUM or individual quantum stocks make more sense.

When looking to invest in quantum computing through an exchange-traded fund (ETF), your choices generally come down to a dedicated thematic fund or a broader tech/innovation fund that allocates heavily to the space. Because pure-play quantum companies are still emerging and highly volatile, most dedicated quantum ETFs blend pure-plays with broader supporting tech (like AI, machine learning, and cloud infrastructure).

The primary choices on the market feature distinct approaches:

• Defiance Quantum ETF (QTUM)
  • The Strategy: Tracks the BlueStar Quantum Computing and Machine Learning Index . It uses a modified equal-weight methodology (capping holdings around 2%) to control for volatility.
  • Composition: Only about a third of the fund goes directly to pure-play quantum computing (such as IonQ, D-Wave, and Rigetti), while the rest spans machine learning, AI chips, cloud, and big data infrastructure (with some overlap with large-cap tech indexes).
  • Pros/Cons: It is the largest and most established US-listed quantum-focused ETF, offering strong liquidity and diversification that softens the blow if pure-play quantum stocks slump.
• WisdomTree Quantum Computing Fund (WQTM)
  • The Strategy: A more targeted thematic approach focusing specifically on the hardware, software, and development ecosystems driving practical quantum computing forward.
  • Composition: Features heavier direct weights in prominent pure-plays and tech giants heavily invested in the space, such as Rigetti Computing, D-Wave Quantum, IonQ, Microsoft, and IBM.
  • Pros/Cons: Tends to offer a tighter, more concentrated exposure to actual quantum computing developments rather than broad AI/cloud spillover, though this can also mean sharper short-term volatility.
• Alternative Broad Tech / Innovation ETFs (e.g., ARKQ or broad semiconductor/tech funds)
  • The Strategy: Active or passive tech funds that might hold one or two quantum stocks alongside autonomous tech, robotics, or chips.
  • Pros/Cons: Not ideal if you specifically want quantum exposure, as quantum ends up being a tiny, diluted fraction of the overall portfolio.

Which one should you pick?

• Go with QTUM if you want the most liquid, diversified, and established fund that hedges pure-play quantum risk with adjacent AI and machine learning infrastructure.
• Go with WQTM if you prefer a slightly more concentrated pure-play exposure to the dedicated quantum ecosystem.

To help narrow this down, let me know:

• Are you looking for a pure-play quantum focus , or do you prefer broader tech/AI diversification?
• What is your risk tolerance and intended time horizon for this investment?

When looking to invest in quantum computing through an exchange-traded fund (ETF), your choice largely depends on whether you want a broad, highly liquid tech-stack approach or a more concentrated, pure-play quantum focus.

Because true "pure-play" quantum computing companies are nascent, volatile, and often pre-profit, most funds mix them with broader enabling technologies like AI, advanced semiconductors, and cloud computing.

The primary options available for investors break down as follows:

• Defiance Quantum ETF (QTUM)
  • The Vibe: The pioneer, the largest, and the most established.
  • Expense Ratio: 0.40%
  • What it is: Launched back in 2018, QTUM holds roughly 80–90 stocks. It tracks an index heavily weighted toward machine learning, big data, and cloud infrastructure alongside smaller allocations (10% to 20%) to actual pure-play quantum stocks like IonQ, D-Wave, and Rigetti.
  • Best for: Investors prioritizing liquidity, size, and risk mitigation . It functions more like a diversified tech ETF with a strong satellite allocation to the quantum ecosystem, helping you avoid single-stock lab-failure risks.
• WisdomTree Quantum Computing Fund (WQTM)
  • The Vibe: Higher quantum "purity".
  • Expense Ratio: 0.45%
  • What it is: A more targeted fund explicitly built around the emerging quantum ecosystem. It scores and weights companies based on the actual relevancy and purity of their quantum work (featuring heavier top weights in pure-plays like Rigetti and D-Wave alongside tech giants doing quantum research).
  • Best for: Investors who want tighter, more direct exposure to quantum developments specifically, and who are willing to accept the higher volatility that comes with earlier-stage companies.
• Global X AI Semiconductor & Quantum ETF (CHPX)
  • The Vibe: The "picks-and-shovels" hardware play.
  • Expense Ratio: 0.50%
  • What it is: Focuses heavily on the advanced hardware, data center infrastructure, and semiconductor foundations (such as Nvidia, Micron, and TSMC) required to physically manufacture and run AI and quantum systems.
  • Best for: Investors looking to ride the massive momentum in semiconductors and infrastructure that underpins the entire future of heavy computing.

To help narrow down which fits your strategy, tell me:

• Are you looking for a broad tech-hybrid (like QTUM) or a targeted quantum play (like WQTM)?
• What is your expected time horizon for this investment?

If you want one quantum-computing ETF, my pick would be QTUM (Defiance Quantum ETF).

Why:

• Best diversified exposure: QTUM holds roughly 80+ companies across quantum computing, semiconductors, AI, and related infrastructure rather than betting on one quantum hardware company.
• Reasonable expense ratio: 0.40%, which is quite competitive for a specialized thematic ETF.
• Established: launched in 2018 and has accumulated billions in assets, making it substantially more established than the newer quantum ETFs.
• Less binary risk: its portfolio includes companies such as Micron, Fujitsu, Nokia, RTX and other semiconductor/technology businesses alongside pure-play quantum names.

How I'd rank the choices

QPUX is very different from QTUM. As of July 2026, its portfolio is heavily concentrated in swaps tied to IonQ, Quantum Computing Inc., Rigetti and D-Wave, with a 1.29% expense ratio. That's a leveraged/speculative-style way to express a quantum thesis, not the diversified exposure I'd choose for a core position.

One important caveat: quantum computing is still a highly speculative investment theme. Even QTUM isn't a "safe tech ETF"; you're paying for exposure to a technology whose commercial payoff is still uncertain.

If it were my money: I'd make QTUM a small satellite position, rather than a major part of a portfolio—for example, 2–5% if I had a high risk tolerance.

If you tell me your age, investment horizon, and roughly how much you're considering putting into quantum, I can tell you whether I'd choose QTUM vs QPUX vs buying IONQ/RGTI/QBTS individually, and what allocation I'd use.

If you mean a U.S.-listed ETF for a long-term bet on quantum computing, my pick would be QTUM — Defiance Quantum ETF.

My ranking

Why QTUM: It isn't simply a basket of speculative quantum startups. Its index covers quantum computing and machine learning, with exposure across hardware, chips, software and enabling technologies. It has about 80+ holdings and a 0.40% expense ratio.

WQTM is interesting if you specifically want more exposure to the actual quantum companies. As of July 28, its largest positions included Quantinuum, D-Wave, Rigetti and IonQ, while also holding IBM, Microsoft, Amazon and Alphabet. Its expense ratio is 0.45%. www.wisdomtree.com The catch is that WQTM is much smaller and launched only in October 2025, so I'd regard it as the more speculative choice.

What I'd do

If I wanted quantum exposure without making it a huge part of my portfolio:

• 80–90% of my quantum allocation → QTUM
• 10–20% → WQTM if I wanted additional pure-play exposure
• Keep the overall quantum allocation relatively small because this is a highly speculative theme.

One important caveat: QTUM has already had a very strong run. Its 2025 annual report showed a 36.35% one-year NAV return and 23.41% annualized return since inception, versus 17.88% and 14.29% respectively for the S&P 500 over those periods. Past performance obviously doesn't mean those returns will continue.

Bottom line: QTUM is my choice for the best risk-adjusted quantum ETF; WQTM is my choice if you're deliberately seeking more concentrated quantum upside.

If you tell me your age, investment horizon, and whether this is a $5k / $25k / $100k position, I can also tell you how much I'd allocate to QTUM vs QQQ/VTI/S&P 500, rather than just picking the ETF.

Choosing a quantum computing ETF depends entirely on whether you want pure-play exposure to early-stage quantum specialists or a broad infrastructure/tech blend that buffers your risk with established tech giants.

The primary options available for US investors break down as follows:

• WisdomTree Quantum Computing Fund (WQTM)
  • Best For: Direct, targeted exposure to the quantum ecosystem.
  • Expense Ratio: 0.45%
  • Strategy: It tracks an index explicitly scoring companies on their "quantum purity" and relevancy. It holds a mix of pure-play hardware/software developers (like D-Wave Quantum, Rigetti Computing , and IonQ ) alongside major cloud and enterprise players (like Microsoft, IBM, and Amazon). It is heavily tailored to the quantum theme, meaning higher volatility tied directly to the sector's developmental milestones.
• Defiance Quantum ETF (QTUM)
  • Best For: A broader, more diversified play on quantum infrastructure, machine learning, and post-quantum cryptography.
  • Expense Ratio: 0.40%
  • Strategy: QTUM is a broader thematic tech ETF. While it includes quantum computing elements, its holdings lean significantly into broader quantum-adjacent infrastructure, high-performance semiconductors, and cybersecurity. It carries a larger asset base and reduces single-stock blowup risk compared to a pure quantum basket, but pure-play quantum breakthroughs will move its needle less.
• Global X AI Semiconductor & Quantum ETF (CHPX)
  • Best For: Pairing quantum upside with the proven growth of AI hardware and chips.
  • Strategy: Focuses heavily on the semiconductor and advanced computing backbone required to drive both artificial intelligence and emerging quantum architectures, blending mega-cap chipmakers with specialized quantum innovators.

Key Considerations Before Buying

• High Volatility: Pure-play quantum companies are largely in a pre-profit, heavy R&D growth phase. Expect dramatic price swings.
• Dilution vs. Concentration: Dedicated funds like WQTM give you cleaner exposure to the exact theme, whereas broader funds like QTUM dilute your quantum exposure with standard tech/semiconductor giants.

To help narrow this down, let me know:

• Are you looking for a pure-play quantum focus (higher risk/reward) or a diversified tech/infrastructure mix?
• What is your time horizon for this investment?

If you want one quantum-computing ETF, my pick would be QTUM (Defiance Quantum ETF)—but I’d treat it as a small, speculative satellite position, not a core holding.

My take

1. QTUM — best all-around choice

• Expense ratio: 0.40%
• Large and established: roughly $5B+ in assets
• Broad exposure across quantum computing, semiconductors, AI and related technologies.
• Its index is specifically designed around companies involved in quantum computing and machine learning.
• The big advantage is diversification: you're not betting everything on IonQ, Rigetti, D-Wave, or another single quantum company.

2. WQTM — better if you want more direct quantum exposure

• Expense ratio: 0.45%
• Launched in October 2025, so it has a much shorter track record.
• WisdomTree says it combines pure-play quantum companies with larger technology companies.
• Its portfolio has meaningful exposure to companies such as IonQ, Rigetti and D-Wave, making it a somewhat more concentrated quantum bet.

3. CHPX — best if you really mean "quantum + chips"

• Expense ratio: 0.50%
• More heavily tilted toward semiconductor giants such as Micron, TSMC, Nvidia and Broadcom.
• I'd view this less as a pure quantum ETF and more as a semiconductor/AI fund with quantum exposure.

What I'd do

If I had $10,000 specifically earmarked for the quantum theme, I'd be inclined toward something like:

$7,000 QTUM + $3,000 WQTM

rather than putting the entire $10,000 into individual quantum stocks.

The important caveat: quantum ETFs are high-risk thematic investments. Even QTUM isn't a pure-play quantum fund—the majority of its portfolio can consist of semiconductor, software and other technology companies. That's actually a feature if you want to reduce the risk of one quantum technology failing, but it also means your returns won't be a pure measure of the quantum industry's success.

If you tell me how much you're investing, your time horizon (e.g. 5/10/20 years), and whether this is in a Roth IRA, 401(k), or taxable account, I can tell you which ETF I'd choose and what percentage of your overall portfolio I'd put into it.

The primary quantum computing-focused exchange-traded funds to consider are the Defiance Quantum ETF (QTUM) , the WisdomTree Quantum Computing Fund (WQTM) , and the Global X AI Semiconductor & Quantum ETF (CHPX) . Choosing the right one depends on whether you prefer a broader, more established tech-hybrid fund or a targeted approach to the theme.

Comparing Top Quantum-Adjacent ETFs

Key Investment Considerations

• Pure-Play vs. Diversified: Most quantum ETFs are not 100% "pure-play" quantum stocks because pure quantum companies are still scarce or heavily volatile . Funds like QTUM include larger tech and machine learning components to dilute single-industry risk.
• Volatility: Quantum computing is a long-term developmental technology. Expect high sensitivity to macroeconomic shifts in tech spending and interest rates.
• Expense Ratios: Fees range between 0.40% and 0.50%, which is standard for niche thematic technology funds.

If you'd like, let me know:

• What is your risk tolerance and investment horizon?
• Are you looking for pure-play individual stocks (like IonQ or D-Wave) alongside or instead of an ETF?

I can provide a more tailored breakdown.